Phronia avidoides sp.n. and Phronia fennica sp.n. are described based on several adult males collected by Malaise trapping, sweep-netting and rearing from decaying wood in Finland and Russian Karelia in the period 1989–2005. Detailed illustrations ofmale terminalia are also presented for three further closely related but poorly known species, Phronia avida Gagne, 1975, Phronia petulans Dziedzicki, 1889 and Phronia subsilvatica Hackman, 1970.